Problema Solution
For 6 consecutive years, Joan's age was divisible by her granddaughter's age. What were their ages during that period? (Enter your answers as a comma-separated list.)
Answer provided by our tutors
Take a look at the list of first 30 prime numbers ascending and see which 2 prime neighbor numbers differ by more than 5. Then take the first of those 2 prime numbers and try it out.
We assume the granddaughter's age is: 1, 2, 3, 4, 5 , 6,
One answer is:
1, 61
2, 62
3, 63
4, 64
5, 65
6, 66